protected static boolean isTileVisible(
DrawContext dc, Tile tile, double minDistanceSquared, double maxDistanceSquared) {
if (!tile.getSector().intersects(dc.getVisibleSector())) return false;
View view = dc.getView();
Position eyePos = view.getEyePosition();
if (eyePos == null) return false;
Angle lat =
clampAngle(
eyePos.getLatitude(),
tile.getSector().getMinLatitude(),
tile.getSector().getMaxLatitude());
Angle lon =
clampAngle(
eyePos.getLongitude(),
tile.getSector().getMinLongitude(),
tile.getSector().getMaxLongitude());
Vec4 p = dc.getGlobe().computePointFromPosition(lat, lon, 0d);
double distSquared = dc.getView().getEyePoint().distanceToSquared3(p);
//noinspection RedundantIfStatement
if (minDistanceSquared > distSquared || maxDistanceSquared < distSquared) return false;
return true;
}
protected void movePolygon(Point previousMousePoint, Point mousePoint) {
// Intersect a ray through each mouse point, with a geoid passing through the reference
// elevation.
// If either ray fails to intersect the geoid, then ignore this event. Use the difference
// between the two
// intersected positions to move the control point's location.
View view = this.wwd.getView();
Globe globe = this.wwd.getModel().getGlobe();
Position refPos = this.polygon.getReferencePosition();
if (refPos == null) return;
Line ray = view.computeRayFromScreenPoint(mousePoint.getX(), mousePoint.getY());
Line previousRay =
view.computeRayFromScreenPoint(previousMousePoint.getX(), previousMousePoint.getY());
Vec4 vec = AirspaceEditorUtil.intersectGlobeAt(this.wwd, refPos.getElevation(), ray);
Vec4 previousVec =
AirspaceEditorUtil.intersectGlobeAt(this.wwd, refPos.getElevation(), previousRay);
if (vec == null || previousVec == null) {
return;
}
Position pos = globe.computePositionFromPoint(vec);
Position previousPos = globe.computePositionFromPoint(previousVec);
LatLon change = pos.subtract(previousPos);
this.polygon.move(new Position(change.getLatitude(), change.getLongitude(), 0.0));
}
protected void dragWholeShape(DragSelectEvent dragEvent, Movable dragObject) {
View view = getWwd().getView();
EllipsoidalGlobe globe = (EllipsoidalGlobe) getWwd().getModel().getGlobe();
// Compute ref-point position in screen coordinates.
Position refPos = dragObject.getReferencePosition();
if (refPos == null) return;
Vec4 refPoint = globe.computePointFromPosition(refPos);
Vec4 screenRefPoint = view.project(refPoint);
// Compute screen-coord delta since last event.
int dx = dragEvent.getPickPoint().x - dragEvent.getPreviousPickPoint().x;
int dy = dragEvent.getPickPoint().y - dragEvent.getPreviousPickPoint().y;
// Find intersection of screen coord ref-point with globe.
double x = screenRefPoint.x + dx;
double y =
dragEvent.getMouseEvent().getComponent().getSize().height - screenRefPoint.y + dy - 1;
Line ray = view.computeRayFromScreenPoint(x, y);
Intersection inters[] = globe.intersect(ray, refPos.getElevation());
if (inters != null) {
// Intersection with globe. Move reference point to the intersection point.
Position p = globe.computePositionFromPoint(inters[0].getIntersectionPoint());
dragObject.moveTo(p);
}
}
/**
* Compute the lat/lon position of the view center
*
* @param dc the current DrawContext
* @param view the current View
* @return the ground position of the view center or null
*/
protected Position computeGroundPosition(DrawContext dc, View view) {
if (view == null) return null;
Position groundPos =
view.computePositionFromScreenPoint(
view.getViewport().getWidth() / 2, view.getViewport().getHeight() / 2);
if (groundPos == null) return null;
double elevation =
dc.getGlobe().getElevation(groundPos.getLatitude(), groundPos.getLongitude());
return new Position(
groundPos.getLatitude(),
groundPos.getLongitude(),
elevation * dc.getVerticalExaggeration());
}
protected void moveControlPoint(
ControlPointMarker controlPoint, Point lastMousePoint, Point moveToPoint) {
View view = this.wwd.getView();
Globe globe = this.wwd.getModel().getGlobe();
Position refPos = controlPoint.getPosition();
if (refPos == null) return;
Line ray = view.computeRayFromScreenPoint(moveToPoint.getX(), moveToPoint.getY());
Line previousRay = view.computeRayFromScreenPoint(lastMousePoint.getX(), lastMousePoint.getY());
Vec4 vec = AirspaceEditorUtil.intersectGlobeAt(this.wwd, refPos.getElevation(), ray);
Vec4 previousVec =
AirspaceEditorUtil.intersectGlobeAt(this.wwd, refPos.getElevation(), previousRay);
if (vec == null || previousVec == null) {
return;
}
Position pos = globe.computePositionFromPoint(vec);
Position previousPos = globe.computePositionFromPoint(previousVec);
LatLon change = pos.subtract(previousPos);
java.util.List<LatLon> boundary = new ArrayList<LatLon>();
for (LatLon ll : this.polygon.getOuterBoundary()) {
boundary.add(ll);
}
boundary.set(controlPoint.getIndex(), new Position(pos.add(change), refPos.getAltitude()));
// ExtrudedPolygon ensures that the last boundary position is the same as the first. Remove the
// last point
// before setting the boundary.
boundary.remove(boundary.size() - 1);
this.polygon.setOuterBoundary(boundary);
}
protected boolean isNavSectorVisible(
DrawContext dc, double minDistanceSquared, double maxDistanceSquared) {
if (!navSector.intersects(dc.getVisibleSector())) return false;
View view = dc.getView();
Position eyePos = view.getEyePosition();
if (eyePos == null) return false;
// check for eyePos over globe
if (Double.isNaN(eyePos.getLatitude().getDegrees())
|| Double.isNaN(eyePos.getLongitude().getDegrees())) return false;
Angle lat =
clampAngle(eyePos.getLatitude(), navSector.getMinLatitude(), navSector.getMaxLatitude());
Angle lon =
clampAngle(
eyePos.getLongitude(), navSector.getMinLongitude(), navSector.getMaxLongitude());
Vec4 p = dc.getGlobe().computePointFromPosition(lat, lon, 0d);
double distSquared = dc.getView().getEyePoint().distanceToSquared3(p);
//noinspection RedundantIfStatement
if (minDistanceSquared > distSquared || maxDistanceSquared < distSquared) return false;
return true;
}
